[Elasticsearch] Add support for v9.x

[egalpin]

Fixes#36491 by adding support for Elasticsearch v9.x

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[github-actions]

Assigning reviewers:

R: @m-trieu for label java.

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[egalpin]

@m-trieu Any guidance on how to execute the Elasticsearch unit tests? I took a quick look over https://github.com/apache/beam/blob/master/.github/workflows/README.md but I'm not yet clear on how to execute the unit tests for ES

[github-actions]

Reminder, please take a look at this pr: @m-trieu

[github-actions]

Assigning new set of reviewers because Pr has gone too long without review. If you would like to opt out of this review, comment assign to next reviewer:

R: @Abacn for label java.

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[Abacn]

Ran ./gradlew :sdks:java:io:elasticsearch-tests:elasticsearch-tests-9:build locally and there is one test failure

testValidSSLAndUsernameConfiguration
java.lang.NullPointerException
at org.apache.beam.sdk.io.elasticsearch.ElasticsearchIOTest.testValidSSLAndUsernameConfiguration(ElasticsearchIOTest.java:303)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

also need to add the test target to github action script

beam/.github/workflows/beam_PreCommit_Java_ElasticSearch_IO_Direct.yml

Line 103 in a9e2e68

:sdks:java:io:elasticsearch-tests:elasticsearch-tests-common:build \

[egalpin]

@Abacn thanks! Both should now be fixed

[Abacn]

Thanks, this LGTM

We may add an annoucement to CHANGES.md, either in this PR or as a follow up

* (Java) Elasticsearch 9 Support for ElasticsearchIO ([#36491](https://github.com/apache/beam/issues/36491)).

beam/CHANGES.md

Line 71 in 81bb506

* Support for X source added (Java/Python) ([#X](https://github.com/apache/beam/issues/X)).

[egalpin]

Good call @Abacn, added!